《BS-EN-ISO-284-2003.pdf》由会员分享，可在线阅读，更多相关《BS-EN-ISO-284-2003.pdf（16页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN ISO 284:2003 Incorporating Corrigendum No. 1 Conveyor belts Electrical conductivity Specification and test method The European Standard EN ISO 284:2003 has the status of a British Standard ICS 53.040.20 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:0
2、0 2006, Uncontrolled Copy, (c) BSI BS EN ISO 284:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 13 August 2003 BSI 22 January 2004 ISBN 0 580 42453 7 National foreword This British Standard is the official English language version of EN
3、 ISO 284:2003. It is identical with ISO 284:2003. It supersedes BS EN 20284:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/67, Conveyor belts, which has the responsibility to: A list of organizations represented on this committee can be obta
4、ined on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility
5、of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. ai
6、d enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages Th
7、is document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amend
8、ments issued since publication Amd. No. DateComments 14984 Corrigendum No. 1 22 January 2004 Corrected EN ISO foreword Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 284 August 2003 I
9、CS 53.040.20Supersedes EN 20284:1993 English version Conveyor belts - Electrical conductivity - Specification and test method (ISO 284:2003) Courroies transporteuses - Conductibilit lectrique - Spcification et mthode dessai (ISO 284:2003) Frdergurte - Elektrische Leitfhigkeit - Spezifikation und Prf
10、verfahren (ISO 284:2003) This European Standard was approved by CEN on 10 July 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists a
11、nd bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibil
12、ity of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Ma
13、lta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and
14、by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 284:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CORRECTED 2003-12-17 Foreword This document (EN ISO 284:2003) has been prepared by Technical Committee ISO/T
15、C 41 “Pulleys and belts (including veebelts)“ in collaboration with Technical Committee CEN/TC 188 “Conveyor belts“, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the
16、latest by February 2004, and conflicting national standards shall be withdrawn at the latest by February 2004. This document supersedes EN 20284:1993. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europe
17、an Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 284:2003 has been approved by
18、CEN as EN ISO 284:2003 without any modifications. EN ISO 284:2003 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 284:2003(E) OSI 3002 INTERNATIONAL STANDARD ISO 284 Third edition 2003-08-01 Conveyor belts Electrical con
19、ductivity Specification and test method Courroies transporteuses Conductibilit lectrique Spcification et mthode dessai EN ISO 284:2003 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:482 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian e
20、mdebt dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file mirp eb yatnde iv roweb detu slahl ton ide ebtlnu deess teh typfecaes wihce era hml era deddebicsnede ti dna onstlalde t noeh comuptfrep reromign tide ehtin.g In wodlnidaot gnihs fil,e trapise atpecc tiereht nser ehnopsiiblity
21、fo nto ifnriigngn Aebods licnesilop gnic.y ehT ISO tneClar Secrteirata caceptl on siibality in this .aera Ai ebods a tedarmfo kra Aebod SystemI snctaropro.de teDials fo teh sfotwcudorp erats sut deo crtaee tihs PDF file cna f ebi dnuon tlareneG eh Ifnler oatit evt oeh file; tP ehDc-Frtaeino marapter
22、ew stpo ereimizde fro irptni.gn Evyre cera neeb sah takne tsne oeru taht teh file is siutlbae fosu re yb ISO memdob rebeis. In tlnu ehikletneve y ttah lborp aem lertait gno it is f,dnuo plsaee ifnrom ttneC ehlar Secterirata ta teh serddaig sleb nevwo. ISO 3002 All irthgs erse.devr lnUeto sswrehise s
23、pecified, on trap fo this lbupictaion maeb y cudorperro de tuilizi den yna form ro na ybm ynae,s lecetrinoc ro mceinahcla, incliduntohp gcoiypodna gn micrfoilm, wittuoh repmissii now nritign from ietI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cnuotfo yr ttseuqer ehe.r ISO cirypothg fofic
24、e saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o gro ii ISO 3002 Allr ihgtsser edevr EN ISO 284:2003 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:482 O3002(E) I SO
25、 3002 All irhgts seredevr iii Contents Page Forewordiv 1 Scope 1 2 Normative references . 1 3 Specification 1 4 Test method. 1 4.1 Principle. 1 4.2 Materials and apparatus. 1 4.3 Test pieces. 3 4.4 Atmosphere for conditioning and testing 3 4.5 Procedure 3 4.6 Expression of results 4 4.7 Test report
26、. 4 Annex A (informative) Variation of electrical resistance with temperature and humidity 5 Bibliography . 6 EN ISO 284:2003 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:482 O3002(E) iv I SO 3002 All irhgts seredevr Foreword ISO (the
27、International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee
28、 has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnic
29、al standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bo
30、dies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying an
31、y or all such patent rights. ISO 284 was prepared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3, Conveyor belts. This third edition cancels and replaces the second edition (ISO 284:1982), which has been technically revised. EN ISO 284:2003 Licensed Copy:
32、 sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADR IS:482 O3002(E) I SO 3002 All irhgts seredevr 1 Conveyor belts Electrical conductivity Specification and test method 1 Scope This International Standard specifies the maximum electrica
33、l resistance of a conveyor belt and the corresponding test method. The test is intended to ensure that the belt is sufficiently conductive to avoid the accumulation of electrical static charge which may be developed during service use. This International Standard is not suitable or applicable to lig
34、ht conveyor belts as described by EN 8731, the static electrical properties of which are measured by EN 16372. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reference
35、s, the latest edition of the referenced document (including any amendments) applies. ISO 18573:1), Conveyor belts Test atmospheres and conditioning periods 3 Specification The electrical resistance of the conveyor belt when tested in accordance with the method described in Clause 4 shall not exceed
36、3 108 (300 M). Lower values may be specified for special applications. 4 Test method 4.1 Principle An electric current of specified voltage is passed via electrodes through a suitably prepared test piece taken from the belt. 4.2 Materials and apparatus 4.2.1 Sheet of insulating material, a little la
37、rger than the test piece. 4.2.2 Two cylindrical and coaxial brass electrodes, the base of one being circular and the other annular. The dimensions and masses are given in Figure 1. The bases of these electrodes shall be machined flat and polished. A flexible insulated wire shall be connected to each
38、 electrode. 1) To be published. EN ISO 284:2003 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:482 O3002(E) 2 I SO 3002 All irhgts seredevr 4.2.3 Ohmmeter (resistance measuring instrument), with a range up to 1010 and accurate to 5 %. 4.
39、2.4 Source of direct current, adjustable up to 1 000 V, and not permitting a current greater than 10 mA or causing an energy dissipation of more than 1 W in the test piece. The source of current may be either an accumulator or a rectified, stabilized AC-power supply. 4.2.5 Contact agent (to ensure g
40、ood contact between electrodes and test piece), having an electrical surface resistivity no higher than 104 . A jelly of suitable composition is given in Table 1. Table 1 Suitable composition of contact agent Component Proportion parts by mass Anhydrous polyethylene glycol (molecular mass: 600) 800
41、Water 200 Potassium chloride 10 Soft soap (pharmaceutical quality) 1 Dimensions in millimetres Key 1 electrode of minimum mass of 115 g 2 electrode of minimum mass of 900 g Figure 1 Electrodes EN ISO 284:2003 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:17:16 GMT+00:00 2006, Uncontrolle
42、d Copy, (c) BSI IS:482 O3002(E) I SO 3002 All irhgts seredevr 3 4.3 Test pieces 4.3.1 Dimensions The test piece shall be square and shall be cut from the full thickness of the belt. The length of a side shall be 300 mm minimum. 4.3.2 Number One test piece shall be taken. If the specification require
43、s that two or more test pieces are to be taken but does not specify how they shall be selected, reference may be made to ISO 2823. 4.3.3 Cleaning of test surfaces If suitable, clean both surfaces of the test piece by rubbing with fullers earth, (i.e. hydrated magnesium- aluminium silicate), for exam
44、ple, using a clean cloth. After cleaning away all traces of the powder, wipe the surface with a clean cloth moistened with distilled water and then dry with a clean cloth. 4.4 Atmosphere for conditioning and testing Before testing, expose the test piece for at least 2 h to one of the standard labora
45、tory atmospheres specified in ISO 18573. Conduct the test in this atmosphere (see Annex A). An atmosphere of 23 C 2 C and 50 % 5 % relative humidity is preferred. 4.5 Procedure 4.5.1 Check test room atmosphere. 4.5.2 Paint on one of the surfaces of the test piece the contact agent described in 4.2.5
46、 in the two areas illustrated in Figure 2. Great care shall be taken to ensure the accuracy of the dimensions of the areas, but the symmetry of the centre is not critical. If the test piece surface is flat, this jelly may be painted on the bottom surface of the cleaned electrodes. In the case of tex
47、tured surfaces, the two areas shown in Figure 2 shall be painted on the test piece. The test shall be carried out immediately after painting. NOTE In the case of covers with surface undulations, contact between the electrodes and the test piece can be improved by thin sheets of metal foil of the sam
48、e dimensions as the brass electrodes, placed on the liquid contact agent and made to follow the form of the surface by rubbing lightly with the finger. The brass electrodes are then placed on the foil. 4.5.3 Place the test piece on the sheet of insulating material, with the test surface upwards. 4.5
49、.4 Clean the lower faces of the brass electrodes and place them on the liquid contact agent pattern on the test piece. 4.5.5 Take care not to breathe on the test surface, as any condensation of moisture may falsify the result. 4.5.6 Connect the outer electrode to the earth or low voltage terminal of the measuring instrument. 4.5.7 Connect the inner electrode to the high voltage terminal of the m